Don't use that article as a guideline was the point of my post. It's not going to make it.

You can build one and it can be somewhat mild at idle especially with a hyd roller. Clean up the bowls/ports, LD/rpm/Air Gap, headers and a HR cam in the 235 at .050, .525-.550 lift and you should be in the neighborhood.

If the heads are left in factory port configuration, it's harder to get there.